I've found that Romanian deadlifts (using a barbell) with a pause just below the knees hits the hams the hardest for me. But I really love olympic style good mornings (think of a squat and good morning put into one move).
Good mornings for me as well.Also known as "tomorrow mornings" because of the soreness most people feel from them.I use to like supersetting them with glute/ham raises.
I would not recommend GMs on a machine because you'll want your natural motion to go through with this movement. Two things- realize that heavy is subjective-what I find heavy is not what you'll find heavy. And never load the weight so heavy that your form suffers.
Good points by evolution regarding good mornings.Also, the safest place to do them is in the power rack with the safety pins set at the lowest point of your range of motion.If something goes wrong or you can't finish the rep, you have the safety pins to back you up.
Also, the safest place to do them is in the power rack with the safety pins set at the lowest point of your range of motion.If something goes wrong or you can't finish the rep, you have the safety pins to back you up.